Can one person perform Tarāwīḥ alone?
Yes… One can perform Tarawih alone, at home, or at his workplace. You can also do it in the mosque, when there’s no one in the mosque doing Tarawih, except you.
Actually, Tarawīh was done individually, during the time of the Prophet, āallā Allahu ʿalaihi wa sallam, and the era of Abu Bakr, raḍiya Allāhu ʿanhu.
Sayyiduna Umar, raḍiya Allāhu ʿanhu, was the first to gather Muslims, to pray Tarāwīḥ behind one Imam. This was to get the people organized, and because doing it in congregation means we motivate one another.
Allah knows best.
Allahu Hafiz 🙂